What do you want (is) when you grow up?用所给单词的适当形式填空

问题描述:

What do you want (is) when you grow up?用所给单词的适当形式填空

你长大后想做什么?所以应该填 to be

这个、、、
应该是
What do you want (to be )when you grow up?
你长大了想干什么

What do you want to be (is) when you grow up?
want to do sth想要做某事(want后的单词用不定式)

啥意思!可不可以详细一点?